What absorbs at 570 cm⁻¹ in an FTIR spectrum?
A band near 570 cm⁻¹ can point to several functional groups. Below are the most likely assignments, ranked by how much published evidence supports each — every one traceable to literature (DOI) and cross-validated against our 130,000+ reference spectra and knowledge graph.
Backed by 8 cited sources
Quick answer
A band near 570 cm⁻¹ is usually interpreted by checking which functional groups repeatedly co-occur there in the literature, then confirming at least one or two additional peaks in the same sample. This page ranks those assignments by accumulated evidence rather than by a single fixed textbook rule.
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| Metal oxygen | 16 | 13 | 1.0 |
| Phosphate (PO4) | 6 | 5 | 1.0 |
| Silicon-oxygen (Si-O) | 4 | 4 | 1.0 |
| Hydroxyl (O-H) | 4 | 3 | 1.0 |
| Silicon (Si) | 3 | 3 | 1.0 |
| Phosphorus | 2 | 2 | 1.0 |
| Hydrogen bond | 2 | 1 | 1.0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1.0 |
| Sulfonate | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Water (H2O) | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Nitrate | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| Borate | 1 | 1 | 1.0 |
Ranking reflects accumulated literature evidence, not a single fixed rule. Always confirm against your sample context.
Possible materials
| Material | Supporting peaks | Overlapping groups | Cited sources |
|---|---|---|---|
| MWCNTs | 570, 3396, 1735 | Hydroxyl (O-H) | 1 |
| Fe3O4 | 570, 2358, 1673 | Hydroxyl (O-H), Metal oxygen, Silicon-oxygen (Si-O) | 1 |
| SiO | 570, 800, 1745 | Silicon-oxygen (Si-O), Hydroxyl (O-H) | 1 |
| Fe3O4 nanoparticles | 570, 1673, 1470 | Hydroxyl (O-H), Metal oxygen | 1 |
Materials are shown only when the same literature pool supports this band and at least one additional characteristic peak.
Spectrum logic
This band becomes meaningful only when read with its neighboring peaks. In practice, analysts first look at the assignments above, then check whether the same sample also shows other peaks expected for the same structural motif. A lone band near 570 cm⁻¹ is usually not enough for material identification by itself.
Real-world usage
This type of query is common in polymer identification, unknown plastic screening, QC troubleshooting, recycled-material verification, and literature-backed peak assignment review.
Common mistakes
- Treating one isolated band as proof of a material without checking at least one or two supporting peaks.
- Ignoring overlap: multiple functional groups can contribute near the same wavenumber.
- Skipping validation when additives, blends, oxidation, or contamination may distort the spectrum.
Verification advice
When ambiguity remains, validate the hypothesis with DSC, GC-MS, or TGA, especially for blends, degraded samples, and filled polymers.
Literature behind these assignments
-
confidence 1.0
“The Raman peaks at 570 could be due to The authors thank the Department of Science and in-plane bending from carbon and oxygen from the phenolic Technology - Nano Mission India (grant no.”
Kalmodia 等 - 2013 - Synthesis and characterization of surface-enhanced DOI: 10.2147/IJN.S49447 -
Hydrogen bond confidence 1.0
“The FTIR data indicates that y1 SiH bonds dominate over Ge:H bonds by the absence of peaks at 570 and 1880 cm .”
Soukup 等 - 2004 - Deposition of high quality amorphous silicon, germ DOI: 10.1016/j.surfcoat.2003.08.006 -
Phosphate (PO4) confidence 1.0
“The FTIR spectra after HBSS immersion show a split peak at approximately 570 It corresponds 43to P-O bonding vibrations in a PO tetrahedron and indicates the presence of crystalline calcium phosphates including carbonated hydroxyapatite (CH”
Fabrication of sol-gel derived new quaternary silicate Bioglass S55P4 DOI: 10.1063/1.5089369 -
Phosphate (PO4) confidence 1.0
“Two PO bending modes at 569.6 and bands were attributed to the 4(PO 4) modes .The”
Wang 等 - 2005 - Nanostructure properties of hydroxyapatite nanobel DOI: 10.4028/www.scientific.net/KEM.288-289.187 -
confidence 1.0
“The FTIR remained the inverse spinel crystal structure of cubic Fe 4 3O characteristic peaks of MWCNTs weakened or disappeared due to the anchor of Fe 4 Fe-O cm-1 nanoparticles and peak at 570 was indicative of the formation of Fe 3O 4.”
Xu 等 - 2016 - Heterogeneous Fenton-like discoloration of methyl DOI: 10.1007/s11706-016-0326-z -
Metal oxygen confidence 1.0
“cm(cid:4)1 Magnetic structures characteristic of the Fe-O bonding in inverted spinel structure and the absorption band at 570 cm(cid:4)1 indicating the presence of PDMS on the magnetic iron oxide bands in 1263, 1105, 1025 and 800 particles.”
Particles that slide over the water surface: Synthesis and characterization of iron oxides particles coated with PDMS, with hydrophobic and magnetic properties DOI: 10.1016/j.matchemphys.2015.05.014 -
Borate confidence 1.0
“ions as well as the distinct band at cm-1, It is accepted by several studies on fluoro-borate glasses 460 which is related to the alteration of B-O-B cm-1 that due to the analogous masses and almost equal radii of bond angle, while the band”
Influence of Vanadium Oxide on the Optical and Electrical Properties of Li (Oxide or Fluoride) Borate Glasses DOI: 10.1007/s11664-022-10187-8 -
confidence 1.0
“However, the main bands that characterize the formation of spinel phase are located at 570 cm-1, and 440 which are associated with the vibrations of Zn-O and Fe-O bonds, respectively [27,44].”
Effects of Solvent Diols on the Synthesis of ZnFe2O4 Particles and Their Use as Heterogeneous Photo-Fenton Catalysts DOI: 10.3390/ma7096281
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